If you don't have the time or inclination to watch the Kevin Smith video, there's one thing he mentions that Prince fans will want to know.
Acoording to Smith, he was told by one of Prince's people that there are a lot of songs (at least 50) that Prince recorded and had fully produced videos for that have never been released. Prince put them away in a "vault".
Perhaps those songs / videos will now be released over the next few months / years.